1. Schwartz, G.: Survival after coronary occlusion. A radio address, under auspices of Bronx County Medical Society, November 7, 1955.
2.
Helpern, M.: Proceedings, N.Y.C. Institute on Workman's Compensation, New York, Oct. 22-23, 1958, p. 51.
3.
Weinberg, S.B. , AND Helpern, M.: Unexpected death in coronary heart diseases . In Work and the Heart, Ch. 33. Paul B. Hoeber, Inc., New York, 1959.
4.
Spain, D. M., AND Bradess, V. A.: Relation of sex, age and physical activity to sudden death from coronary arterial occlusion. In Work and the Heart, Ch. 32.Paul B. Hoeber Inc., New York, 1959.